PART 8

a. Explain a simple point to point light wave system 3 b. Make the power budget and
calculate the maximum transrn.ission distance 6 for ൨310൩൩ light wave system operating
at 100Mb/s and using an LED for launching-13dBm of average power into the fiber.
Assume 0.208/1 m fiber loss, 0.2dB splice loss every 2 Km, 1013 connector loss at each
end of fiber link, and IOOnW receiver sensitivity, Allow 6 dB system margin.

a. Explain 010 noise present in Optical amplifiers. Show that noise figure of an 9 ideal
amplifier is 3dB.

a. Explain the principle of operation of Raman amplifiers. 5

b. Explain the prechirp technique of dispersion compensation. 4

PART C
a. With a block diagram explain a soliton communication link. 6
b. What is Gordon-Haus jitter? Differentiate between dark and bright solitons. 6

a. Which are the low loss transmission windows used for WDM. Briefly outline 6 the
challenges of DWDM.

b. Describe the structure of FBG. Design an add-drop multiplexer using Fiber 6 Bragg
graHng and circulator.

a. Derive the expression for SNR of heterodyne coherent detection(Use suitable 8
approximations).

b. With a block diagram describe a dual filter FSK receiver. 4